Suction box lever for suction rolls



2 Sheets-Sheet l H. R. FARNSWORTH Filed March 26, 1928 INVITOR.

MM' E a f @M AToRNEYS.

SUCTION BOX LEVER FOR SUCTION ROLLS May .17, 1932.

May 17, 1932. HA R. FARNSWORTH L853545 SUCTION BOX LEVER FOR SUCTION ROLLS Filed March 26. 1928 2 Sheets-Sheet 2 A TTORNEYS.

Patented May 17, 1932 UNITED STATES PATENT oFFlcE HILAND R. FARNSWORTH, OF SANDUSKY, OHIO, ASSIGNOR TO THE PAPER & TEXTILE MACHINERY COMPANY, OF SANDUSKY, OHIO SUCTION BOX LEVER FOR SUCTION ROLLS Application tiled March 2G, 1928. Serial No. 264,637.

The present invention relates to a wire replacement means for suction rolls and more particularly to a leverage device directly applicable to the roll.

Heretofore it has been the general practice to use a device known in the trade as a tooth pick and' adapted to be inserted into the suction roll shell from end opposite to that through which the suction is taken. This tooth pick is a rod or bar of considerable length and simply gives a lifting purchase at that end of the shell and removed beyond that end a distance somewhat greater than the width of wire to be used in replacement. Thus, in the more general practice, the upper bearing sections at that end are removed sufficiently to enable the lifting of that end of the shell suiiciently to enable the wire to be slipped laterally between the lower bearing and adjacent shell wall, the looped wire is then brought opposite that end of the roll, the tooth pick is then slid through the wire loop and suiiciently into the shell to give the necessary purchase for lifting. A hoist of any desired type is thenapplied to the projecting or free end of the tooth pick. A block and tackle, ack, or other means of well known construction and operation is then applied to lever that end of the roll upwardly. In this construction the opposite end suction roll bearing becomes the fulcrum as will be readily understood, only a very slight Swinging movement beyond that point immediately wrecks fulcrum action is possible.

some of the apparatus. Practically always the damage, and it is very costly damage, results at or in the neighborhood of the fulcrum, where practically the entire strain is centred. It will be understood, of course, that only a very slight lift of the free-end of the roll is necessary. Likewise it is obvious that, because of the great weight being handled a powerful hoisting apparatus isA necessary. Such apparatus, of course, must be instantly stopped-atthe right point. The slightest excess lift beyond that point ,instantly wrecks the parts at the fulcrum end, as

reviously stated. As soon as the roll end as been lifted, the wire is slipped laterally from the tooth pick over the shell, the shell lowered,- and the tooth pick withdrawn.

Many forms of these tooth picks have been devised and a considerable number patented. Inv all there is the same difficulty in their use-damage at fulcrum end.

More recently an attempt has been made to operate from the opposite end by reducing the shell end and extending it beyond its bearing to act as a lever having a fulcrum at the bearing, the bearing being specially constructed as a sliding fulcrum to permit both a slight sliding and pivot motion of the shell, simultaneously. I refer to the patent to E. E.

IBerry 1,602,87 5 dated October 12, 1926, reissued as 16,848 January 10, 1928. In this construction there is a tremendous strain, the entire weight of the whole assembled roll on a small diameter elongated tube. A special construction sliding rocker bearing must be resorted to with this construction to accommodate the pivotal swing of the shell.

The construction and disposition of the various parts of this invention have been so devised and designed as to overcome the objections above noted, while at the same time providing a simple, compact eiicient and economical construction with the least possible variation or modification of any of the parts. In fact, the only actual change in construction, if such may logically be called a change, is the extension of: the suction box at one end to provide the lever.

In order to more clearly disclose the construction, operation and use of the invention reference should be had to the accompanying drawings forming part of the present application. Throughout the several figures of the drawings like reference characters designate the same parts in the several views.

In the drawings: v

Fig. 1 is a central vertical longitudinal cross section through the roll;

Fig. 2 is a side elevationv showing bearing carriage removed, and, in dotted line position, assembled.

Fig. 3 is a lateral cross section on line 3-3 of Fig. 1, 'looking in the direction of the arrows.

Fig. 4 is a left 'hand end view of Fig. 1.

Fig. 5 is a fragmentary cross section of the left hand end of Fig. 1 with sup orting carriage and box removed to show ugs of head. f l

Fig. 6 is a fragmentary vertical cross sec- 5 tion ofthe right hand end of the roll, showing a modied form; and

Fi 7 is an end elevation showing a modied crm of fulcrum.

According to the present .invention the 10 leverage is applied indirectly to the shell, as

a direct lift instead of as a lever. The leverage is applied directly to the suction box and, through it, as a lift to the shell at its free end. The shell 1 is of well known construction and of the same diameter throughout. The heads 9 and 10 for supporting the suction box, and the adjustable mounting of the box ends within the heads, as well -as the 'de rails and rollers for inserting and running the box are of well known construction and need not be described in detail in the present application as they do not enter into this particular invention, particularly as to the general features yof such constructions.

The suction box 2 extending longitudinally through the roll is socketed at 'its suction end to receive a suction tube or strong pipe 3 which is extended considerably beyond the roll end and througha yoke 4 and then coupled in any suitable manner to the piping of the suction line. At a point between the shell end and yoke 4 a fulcrum ost or block I 5 is provided. *This ost is ma e fast either to a frame member o the machine, the floor, or some other solid support capable of adequately sustaining the weight imposed. As shown in the drawings particularly Fig. 1, the upper surface of the fulcrum ]ust. contacts with the cooperating under face of suction tube 3, at that point, there bein no apreciable weight or ressure on the lcrum.

uction tube 3 is, o course, in eect, an extension of suction box 21. If made in one,

piece with 'box 2 as an elongation of it, the construction would be substantially the same and the operation and results obtainedl would be the same as in the exact construction shown" in Fig. 1, where the boxi and tube are se arate but firmly connected, one within t e other. Directly above the tube-3, where it passes through yoke 4, is a pressure screw' which is threaded through the yokeand into contact with the upper end of the`tube to `force that outer end vertically downward in 5,5 yoke 4. As will be seen on referencetoFig.

.1 the opening through yoke 4 is sufficiently carrythe head' 10'at that end upwardly. `The rst sli ht upward movement wil-l bring the 5 outer e ges or shoulders of the inwardly ex- 3 angles to the len h o the free end is li ed if it passes what would tending guide lu s 7 which are formed integral with the r1m 11 on the suctiony box 2 into engagement with the inner shell wall and the continued upward movement beyond that point will carry the shell end upwardly with the box. It will be seen that there .is no great strain on the shell any where as a result of this method of lifting. In fact the lifting strain is practically identically the same as the normalstrainfof'supporting the shell by its rdfies'at each end. It will also be clear that the tube 3 has perfect freedom of movement radially in its guides in the corresponding head, toward and from the inner wall of the shell with no'danger of being cramped against or engaged by the shell before the outer end of the tube 3 reaches its lower most position. .As will be readily' derstood, the necessary amount of lift ofthe shell end is very slight-only enough to permit sliding out of its support so that it may remain freely suspended for slipping on of the wire. In this instance the support comprises the usual roller bearings carried by a cradle which, in turn is mounted in a suitable housing. This housing is provided with a set of rollers which may be swung into or out of engagement with the floor by a hand lever and suitable connections of well known type and as clearly shown in Figs. 1 and 2. When the roll end has been partially raised, as above described, this set of rollers will be depressed, thereby putting the housing on wheels.` Then the housing will be run out from under the roll, leaving it suspended on the suction box. y

tively to the length of the suction tube resting thereon and concave in cross section laterally relatively thereto. Thus, upwardly extending side members or wings are provided at the sides of the tube to hold it against lateral slipping-while a rounded fulcrum surface is provided across which the tube is free to rock between such wings.

As a modication and to permit slightly greater. lexibilityor wider range of lift to the free end of the shell, the frame and base for supmrtinethe roller bearings at the suction en `may pivotally c onnected together by laterally or. at right apin 12 extendin the roll. Thus, when otherwise be thevdanger point, the pivot will prevent cramping of the bearings and breakmg'of the'frame. It is obvious, too, that the vertical opening through the yoke 4 below the tube 3-may be correspondingly increased to ,accommodate such further downward swingl of that end of the tube. This pivot arrangement is shownin Fig. 6.

As a modied,thou(g1h not'preferredf, form of fulcrum, a-longitu 'nally concaved roller 8 may be substituted for the fulcrum post..

This roller is ournalled in a suitable bracket place of the ulcrum post 5.

It is thought that the construction, operation and use of the invention will be clearly understood from the preceding detailed description wherein a preferred form has been shown by way of illustration. It is not intended to limit the invention to the exact construction illustrated. Many changes may be made in the construction, arrangement and disposition of the various parts, within the scope of the appended claims, without departing from the iield of the invention and it is meant to include all such within this application wherein only illustrative constructions have been disclosed for a clearer explanation.

Having described my invention, what I claim and desire to protect by Letters Patent 1s: 1. In a suction roll, a revolubly mounted shell, a suction box therein, and means acting upon one end of said box to cause said box to pgage and lift the opposite end of said she 2. In a suction roll, a revolubly mounted shell, a suction box therein, means acting upon one endof said box to cause said box to engage and lift the opposite end of said shell and means for maintainingsaid box in such engagement.

3. In a suction roll, a revolubly mounted shell, a suction box therein and extending therebeyond, and means acting upon said ex-v tended portion to cause said box to 'engage and lift the opposite end of said shell.

4. In a suction roll, a revolubly mounted shell, a suction box therein, a fulcrum adapted to engage said box, and means for moving said box on'said fulcrum to cause it to engage and lift one end of said shell. 4

5. In a suction roll, a revolubly mounted shell, a suction box therein, a fulcrum disposed beneath said box, and pressure means operating upon said box to cause it to swing on said :Eulcrum to engage and lift one end of said shell.

6. In a suction roll, a revolubly mounted shcll, a suction box therein and extended therebeyond, a fulcrum disposed beneath said suction box extension, and pressure means operable upon the extended end to depress it and swing the opposite end upwardly into lifting engagement with said shell.

7. In a suction roll, a revolubly mounted shell, av suction box therein and extended therebeyond, a fulcrum disposed beneath said suction box extension, a yoke surrounding said extension, and means carried by said yoke for adjusting said extension vertically within said yoke to cause lifting engagement between the opposite end of said suction box and the corresponding shell end.

8. In a suction roll, a revolubly mounted shell, a ulcrum spaced from one end of said shell, a yoke spaced from said fulcrum in the same direction relatively to the shell, a suction box within said shell and provided with an extension lying across said fulcrum and projecting through said yoke, and means carried by said yoke and adapted to engage said extension to rock the same on its fulcrum and cause lifting engagement between an end of said box and said shell.

9. In a suction roll, a shell, a movably mounted suction box therein and adapted to support said shell when the shell is in inoperative position and means for supporting said box. i

10. In a suction roll, a shell, a suction box mounted therein and adapted to maintain said shell in suspended overhung position relatively to one end of said roll, when the shell is in inoperative position'and means for `supporting said box.

l1. In a suction roll, a shell, a suction box therein and adapted to engage the inner wall of said shell to thereby support said shell, and means causing such engagement.

12. In a suction roll, a shell, and a suction box therein, one of said parts having swinging movement toward the other.

13. In a suction roll, a shell, and a suction box therein, one of said parts having swinging movement toward the other and about a point in'proximity to one end of said shell.

14. In a suction roll, a shell, a suction box therein, said box having swinging movement toward said shell to support said shell.

15. In a suction roll, a shell, a suction box therein, said box having swinging movement toward said shell to support said shell and means for adjusting such swinging 

